1640158801 has 2 divisors, whose sum is σ = 1640158802. Its totient is φ = 1640158800.

The previous prime is 1640158799. The next prime is 1640158811. The reversal of 1640158801 is 1088510461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1628929600 + 11229201 = 40360^2 + 3351^2 .

It is an emirp because it is prime and its reverse (1088510461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1640158801 - 2¹ = 1640158799 is a prime.

Together with 1640158799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1640158811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820079400 + 820079401.

It is an arithmetic number, because the mean of its divisors is an integer number (820079401).

Almost surely, 2^1640158801 is an apocalyptic number.

It is an amenable number.

1640158801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640158801 is an equidigital number, since it uses as much as digits as its factorization.

1640158801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 1640158801 is about 40498.8740707689. The cubic root of 1640158801 is about 1179.3117697420.

The spelling of 1640158801 in words is "one billion, six hundred forty million, one hundred fifty-eight thousand, eight hundred one".